CN108963995A - A kind of power distribution network reacts region differential protection and the guard method of phase-to phase fault - Google Patents
A kind of power distribution network reacts region differential protection and the guard method of phase-to phase fault Download PDFInfo
- Publication number
- CN108963995A CN108963995A CN201810829714.1A CN201810829714A CN108963995A CN 108963995 A CN108963995 A CN 108963995A CN 201810829714 A CN201810829714 A CN 201810829714A CN 108963995 A CN108963995 A CN 108963995A
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- Prior art keywords
- differential protection
- region
- fault
- phase
- bus
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
- H02H7/28—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured for meshed systems
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/26—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents
- H02H3/32—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors
- H02H3/325—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors involving voltage comparison
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/22—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for distribution gear, e.g. bus-bar systems; for switching devices
Landscapes
- Emergency Protection Circuit Devices (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The invention discloses a kind of region differential protections of power distribution network reaction phase-to phase fault and guard method, device to be mounted at every bus, reads each inlet-outlet line data information on bus by RS485 bus；It is connected between the protective device of each region by optical fiber and realizes communication；It is main website that the most locality protection device of route is classified on bus；Method includes: to choose the most region differential protection of classification route as main website；The route real-time running data that region differential protection in route acquires is intercoursed between the differential protection of region；Region differential protection starts to execute judgement when detecting that monophase current Sudden Changing Rate is greater than setting valve；Fault message is sent when the sum of stalling current of the minimum movements difference current more than or equal to 0.7 times and load current；Fault message to main website is constructed fault message matrix A by step 5, realizes the failure of the detection power distribution network of quickly, efficiently and accurately and phase-to phase fault is isolated.
Description
Technical field
The invention belongs to electrical equipment fault detection technique more particularly to a kind of regions of power distribution network reaction phase-to phase fault
Differential protection and guard method.
Background technique
Currently, power distribution network branch line is numerous, but is not fitted with breaker, exist in the form of on-load switch mostly, and
It cannot be used for disengagement failure electric current.However, distributed generation resource mostly uses breaker access way when accessing, cascade switch is again
Compare more, in order to realize that locality protection may just need to set very long delay, rely solely on the single rank cooperated in time
Segmentation protection no longer meets the requirement that protective relaying device quick and precisely cuts off failure.In this case, the rapidity of protection and
Regionality is exactly a pair of irreconcilable contradiction.With the research application of the limited wide area relay protection of grid, it is
Its implementation in power distribution network provides possibility.Protection system and device lack the technology hand of unified information integration and interconnection
Section, cannot achieve multiterminal differential protection and the cooperation of distributed generation resource autoprotection still so far.
Summary of the invention:
The technical problem to be solved in the present invention: a kind of region differential protection of power distribution network reaction phase-to phase fault is provided
And guard method, to realize the failure of the detection power distribution network of quickly, efficiently and accurately and phase-to phase fault be isolated.
Technical solution of the present invention:
A kind of region differential protection of power distribution network reaction phase-to phase fault, the locality protection device are mounted on every
At bus, and each inlet-outlet line data information on bus is read by RS485 bus；Lead between the protective device of each region
It crosses optical fiber connection and realizes communication；It is main website that the most locality protection device of route is classified on bus.
It includes: CPU to the region differential protection, and analogue collection module is connect with filter module, filter module
It is connect with AD conversion module, AD conversion module is connect with CPU；Communication module is connect with CPU；Input and output module and CPU connect
It connects；The communication module includes serial communication modular, ethernet communication module, GTAG communication module and fiber optic telecommunications module.
CPU is also connect with man-machine interaction unit.
A kind of guard method of the region differential protection of power distribution network reaction phase-to phase fault, it includes:
Step 1 chooses the most region differential protection of classification route as main website；Optical fiber is used between master-salve station
Communication；
Step 2 by the communication mode of optical fiber is adopted region differential protection in route under the unified regulation of main website
The route real-time running data of collection is intercoursed between the differential protection of region, is achieved the purpose that data sharing, is worked as bus
When failure, trip signal is directly issued by region differential protection；
Step 3, region differential protection start to execute when detecting that monophase current Sudden Changing Rate is greater than setting valve
Judgement；
When step 4, first layer differential protection criterion meet, corresponding failure information " 1 " is sent to second layer differential protection,
Otherwise sending information is " 0 "；
Each region differential protection is constructed fault message matrix A by optical fiber transmission fault information to main website by step 5,
Matrix element is set to " 1 " when meeting step 4 condition, be otherwise set to " 0 ", by the distribution of matrix element value, determines faulty section
Domain；
Step 6, fault zone determine after, if region differential protection differential protection put into, positioning failure
Afterwards, trip signal is directly issued, by Fault Isolation；If region differential protection differential protection is not put into, event is shown
Hinder information, plays the purpose of alarm.
Setting valve described in step 3 is the minimum load current not less than 0.3 times, the peak load electricity no more than 0.5 times
Stream.
The invention has the advantages that:
The invention proposes a kind of locality protection framework that centralized distributing combines, each protection dresses of whole feeder line
Setting can communicate between adjacent node protective device, and when phase-to phase fault occurs for protected circuit, it is poor to constitute in a small range
Rotating ring Judging fault, movement cut off failure in circuit breaker trip；Not only solving because data volume is excessive leads to control centre
The problem of being unable to operate normally, and protection algorism is transferred into every protective device, improve the effect of fault zone positioning
Rate；It realizes the failure for realizing the detection power distribution network of quickly, efficiently and accurately and phase-to phase fault is isolated.
Detailed description of the invention:
Fig. 1 is schematic structural view of the invention；
Fig. 2 is guard method flow diagram of the present invention；
Fig. 3 is specific embodiment of the invention locality protection behavior schematic diagram.
Specific embodiment:
A kind of region differential protection of power distribution network reaction phase-to phase fault, the locality protection device are mounted on every
At bus, and each inlet-outlet line data information on bus is read by RS485 bus；Lead between the protective device of each region
It crosses optical fiber connection and realizes communication；It is main website that the most locality protection device of route is classified on bus.
It includes: CPU to the region differential protection, and analogue collection module is connect with filter module, filter module
It is connect with AD conversion module, AD conversion module is connect with CPU；Communication module is connect with CPU；Input and output module and CPU connect
It connects；The communication module includes serial communication modular, ethernet communication module, GTAG communication module and fiber optic telecommunications module.
CPU is also connect with man-machine interaction unit.
A kind of guard method of the region differential protection of power distribution network reaction phase-to phase fault, it includes:
Step 1 chooses the most region differential protection of classification route as main website；Optical fiber is used between master-salve station
Communication；
Step 2 by the communication mode of optical fiber is adopted region differential protection in route under the unified regulation of main website
The route real-time running data of collection is intercoursed between the differential protection of region, is achieved the purpose that data sharing, is worked as bus
When failure, trip signal is directly issued by region differential protection；
Step 3, region differential protection start to execute when detecting that monophase current Sudden Changing Rate is greater than setting valve
Judgement；
When step 4, first layer differential protection criterion meet, corresponding failure information " 1 " is sent to second layer differential protection,
Otherwise sending information is " 0 "；
Each region differential protection is constructed fault message matrix A by optical fiber transmission fault information to main website by step 5,
Matrix element is set to " 1 " when meeting step 4 condition, be otherwise set to " 0 ", by the distribution of matrix element value, determines faulty section
Domain；
Step 6, fault zone determine after, if region differential protection differential protection put into, positioning failure
Afterwards, trip signal is directly issued, by Fault Isolation；If region differential protection differential protection is not put into, event is shown
Hinder information, plays the purpose of alarm.
Setting valve I described in step 3setMinimum load current not less than 0.3 times, the peak load electricity no more than 0.5 times
Stream.
Technical solution of the present invention is further detailed below according to attached drawing:
(1) in order to ensure region differential protection possesses preferable compatibility and can make full use of limited in device
Space, device for mechanical design uses inserter structure, a whole set of region differential protection divided according to hardware circuit module
Intake acquisition module, governor circuit module, output module and display surface are acted for 5 modules: analogue collection module
Plate, wherein power circuit is integrated on analogue collection module.The communication provisioned except traditional protection configuration of locality protection device
Outside interface, fiber optic data communication interface all the way is also set up, and can control between main control module and adjacent protection and lead to by software systems
Letter completes data exchange.
(2) most important condition that wide area protection algorithm shown in Fig. 2 executes is to be collected into wide area protection information, then in director
In scheduling process of being engaged in, there is the communication of data between main website/slave station always, after main website obtains each acquisition data, according to designing
Specification text, parse three-phase current information, the difference current between node two-by-two calculated separately out by information everywhere, it is raw
The purpose of fault zone positioning is finally reached according to the feature location abort situation of matrix at fault message matrix.
(3) illustrate by taking Fig. 3 as an example, 1~5 is intelligent protection device；A~D is distribution bus；DG is distributed generation resource.It should
Method and step is as follows:
Step 1: optional apparatus 2 or device 3 are used as main website, and due to having new energy access at device 2, data volume is inclined
Greatly, comprehensive analysis can choose device 3 as main website.
Step 2: directly carrying out device 2, the device 4 of data exchange with device 3, by figure it is found that device 2 not only needs
The operation data on bus B is acquired, but also needs the real time data at acquisition device 1.Need the data of coupling apparatus 1 comprehensive
The operating status for judging route L1 is closed, in circuit operation failure, the signal of excision failure, structure can be directly issued by device 2
At first layer differential protection.
Step 3: being illustrated first layer differential protection criterion by taking Fig. 4 as an example, M, N be by the both ends of protection section,
DG is branched line containing distributed generation resource, and above-mentioned three branches are all equipped with breaker and protection measurement and control integration device, Load generation
Watchband has the branched line of load, and the branch is not without having protective device.The operation condition of protection is
In formula,Respectively in the regional distribution network can the collected three end magnitude of current, whereinTo divide
The measurement electric current of cloth power supply；For branched line load current；IsetMinimal negative for protection seting value, not less than 0.3 times
Charged current, the maximum load current no more than 0.5 times, setting valve can adjust immediately according to the variation of load on route.
Step 4: second layer differential protection is to be made of main website based on the operation data of multiple spot, when main website summarizes it
When his each bus information, fault message matrix A can be constructed, element is in matrix with aijIt indicates, wherein i represents certain row, and j is represented
Certain column, each aijThe judging result of some first layer differential protection is represented, movement is set to " 1 ", is failure to actuate and is set to
“0”。
As shown in Figure 3, with main website selection device 3, at K1 for phase-to phase fault, fault message matrix A can be constructed.Work as m
There is a when=3, n=434=1, then illustrate that there are fault-signals between bus C and bus D.To realize the quick positioning of failure.
Step 5: after the positioning of fault zone, it is also necessary to situation be put into according to the pressing plate of protective device and determine that protection should
How failure is disposed.If protective device differential protection is put into, after positioning failure, trip signal can be directly issued, by failure
Isolation, if do not put into, can control display module and shows fault message, play the purpose of alarm.
Claims (5)
1. a kind of region differential protection of power distribution network reaction phase-to phase fault, it is characterised in that: the locality protection device peace
Each inlet-outlet line data information on bus is read at every bus, and through RS485 bus；Each region protective device
Between pass through optical fiber connection realize communication；It is main website that the most locality protection device of route is classified on bus.
2. a kind of locality protection device for reacting ground fault according to claim 1, it is characterised in that: the area difference
It includes: CPU to dynamic protective device, and analogue collection module is connect with filter module, and filter module is connect with AD conversion module, AD
Conversion module is connect with CPU；Communication module is connect with CPU；Input and output module is connect with CPU；The communication module includes string
Port communications module, ethernet communication module, GTAG communication module and fiber optic telecommunications module.
3. it is according to claim 2 it is a kind of react ground fault locality protection device, it is characterised in that: CPU also with people
The connection of machine interactive unit.
4. a kind of guard method of the region differential protection of power distribution network reaction phase-to phase fault as described in claim 1, it
Include:
Step 1 chooses the most region differential protection of classification route as main website；Fiber optic communication is used between master-salve station；
What step 2, the communication mode for passing through optical fiber under the unified regulation of main website acquired region differential protection in route
Route real-time running data is intercoursed between the differential protection of region, achievees the purpose that data sharing, works as bus-bar fault
When, trip signal is directly issued by region differential protection；
Step 3, region differential protection start to execute judgement when detecting that monophase current Sudden Changing Rate is greater than setting valve；
When step 4, first layer differential protection criterion meet, corresponding failure information " 1 " is sent to second layer differential protection, is otherwise sent out
Breath of delivering letters is " 0 "；
Each region differential protection is constructed fault message matrix A, matrix by optical fiber transmission fault information to main website by step 5
Element is set to " 1 " when meeting step 4 condition, be otherwise set to " 0 ", by the distribution of matrix element value, determines fault zone；
Step 6, after fault zone determines, if region differential protection differential protection is put into, after positioning failure, directly
Trip signal is issued, by Fault Isolation；If region differential protection differential protection is not put into, fault message is shown,
Play the purpose of alarm.
5. a kind of guard method of the region differential protection of power distribution network reaction phase-to phase fault according to claim 4,
Be characterized in that: setting valve described in step 3 is the minimum load current not less than 0.3 times, the peak load electricity no more than 0.5 times
Stream.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810829714.1A CN108963995B (en) | 2018-07-25 | 2018-07-25 | Regional differential protection device and method for power distribution network to react to phase-to-phase fault |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810829714.1A CN108963995B (en) | 2018-07-25 | 2018-07-25 | Regional differential protection device and method for power distribution network to react to phase-to-phase fault |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108963995A true CN108963995A (en) | 2018-12-07 |
| CN108963995B CN108963995B (en) | 2020-05-15 |
Family
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| CN201810829714.1A Active CN108963995B (en) | 2018-07-25 | 2018-07-25 | Regional differential protection device and method for power distribution network to react to phase-to-phase fault |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110676802A (en) * | 2019-09-05 | 2020-01-10 | 深圳供电局有限公司 | Optical fiber current differential protection setting value field calibration system and method |
| CN111277327A (en) * | 2020-01-21 | 2020-06-12 | 国网四川省电力公司 | Line protection communication channel fault area identification method |
| CN112364495A (en) * | 2020-10-31 | 2021-02-12 | 贵州电网有限责任公司 | Centralized feeder automation simulation platform of main website |
| WO2021103662A1 (en) * | 2019-11-29 | 2021-06-03 | 国电南瑞科技股份有限公司 | Method for positioning fault in flexible dc distribution network |
| CN113346464A (en) * | 2021-06-08 | 2021-09-03 | 国网江苏省电力有限公司连云港市赣榆区供电分公司 | Full-line differential protection system for power distribution network |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101621216A (en) * | 2009-08-18 | 2010-01-06 | 湖北省电力公司 | Data sharing type area protection system based on IEC 61850 |
| CN102270836A (en) * | 2011-01-30 | 2011-12-07 | 武汉百叡电力技术有限公司 | Wide-area over-current protection method and system for power distribution network |
| CN102611086A (en) * | 2012-03-27 | 2012-07-25 | 许继集团有限公司 | Centralized protection system and method for region distribution network |
| CN103107603A (en) * | 2013-03-12 | 2013-05-15 | 华北电力大学 | Region intelligent protection system of transformer substation |
| CN103887879A (en) * | 2014-03-25 | 2014-06-25 | 广州供电局有限公司 | Petal type power distribution network protection control system |
-
2018
- 2018-07-25 CN CN201810829714.1A patent/CN108963995B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101621216A (en) * | 2009-08-18 | 2010-01-06 | 湖北省电力公司 | Data sharing type area protection system based on IEC 61850 |
| CN102270836A (en) * | 2011-01-30 | 2011-12-07 | 武汉百叡电力技术有限公司 | Wide-area over-current protection method and system for power distribution network |
| CN102611086A (en) * | 2012-03-27 | 2012-07-25 | 许继集团有限公司 | Centralized protection system and method for region distribution network |
| CN103107603A (en) * | 2013-03-12 | 2013-05-15 | 华北电力大学 | Region intelligent protection system of transformer substation |
| CN103887879A (en) * | 2014-03-25 | 2014-06-25 | 广州供电局有限公司 | Petal type power distribution network protection control system |
Non-Patent Citations (1)
| Title |
|---|
| 汪旸等: "分布式集中决策的区域智能保护***结构与算法", 《电力***自动化》 * |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110676802A (en) * | 2019-09-05 | 2020-01-10 | 深圳供电局有限公司 | Optical fiber current differential protection setting value field calibration system and method |
| CN110676802B (en) * | 2019-09-05 | 2021-09-24 | 深圳供电局有限公司 | Optical fiber current differential protection setting value field calibration system and method |
| WO2021103662A1 (en) * | 2019-11-29 | 2021-06-03 | 国电南瑞科技股份有限公司 | Method for positioning fault in flexible dc distribution network |
| CN111277327A (en) * | 2020-01-21 | 2020-06-12 | 国网四川省电力公司 | Line protection communication channel fault area identification method |
| CN112364495A (en) * | 2020-10-31 | 2021-02-12 | 贵州电网有限责任公司 | Centralized feeder automation simulation platform of main website |
| CN112364495B (en) * | 2020-10-31 | 2023-09-01 | 贵州电网有限责任公司 | Main station centralized feeder automation simulation platform |
| CN113346464A (en) * | 2021-06-08 | 2021-09-03 | 国网江苏省电力有限公司连云港市赣榆区供电分公司 | Full-line differential protection system for power distribution network |
| CN113346464B (en) * | 2021-06-08 | 2022-07-19 | 国网江苏省电力有限公司连云港市赣榆区供电分公司 | Full-line differential protection system of power distribution network |
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